mirror of
https://github.com/crskycode/GARbro.git
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210 lines
8.4 KiB
C#
210 lines
8.4 KiB
C#
//! \file ArcBOX.cs
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//! \date Sun Jan 17 14:45:34 2016
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//! \brief Aoi engine event script archive.
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//
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// Copyright (C) 2016 by morkt
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//
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using System.Collections.Generic;
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using System.ComponentModel.Composition;
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using System.IO;
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using System.Security.Cryptography;
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using GameRes.Utility;
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namespace GameRes.Formats.Aoi
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{
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internal class BoxArchive : ArcFile
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{
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public readonly byte Key;
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public BoxArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, byte key)
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: base (arc, impl, dir)
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{
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Key = key;
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}
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}
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[Export(typeof(ArchiveFormat))]
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public class BoxOpener : ArchiveFormat
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{
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public override string Tag { get { return "BOX"; } }
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public override string Description { get { return "Aoi engine script archive"; } }
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public override uint Signature { get { return 0x42494F41; } } // 'AOIB'
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public override bool IsHierarchic { get { return false; } }
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public override bool CanCreate { get { return false; } }
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static readonly Dictionary<int, byte> VersionKeyMap = new Dictionary<int, byte> {
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{ 5, 0xAD },
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{ 6, 0xB4 },
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{ 7, 0xB4 },
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{ 10, 0xB2 },
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{ 12, 0xA5 },
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};
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public override ArcFile TryOpen (ArcView file)
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{
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int version;
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if (file.View.AsciiEqual (4, "X10"))
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version = 10;
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else if (file.View.AsciiEqual (4, "X12"))
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version = 12;
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else if (file.View.AsciiEqual (4, "OX7\0"))
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version = 7;
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else if (file.View.AsciiEqual (4, "OX6\0"))
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version = 6;
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else if (file.View.AsciiEqual (4, "OX5 "))
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version = 5;
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else
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return null;
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int count = file.View.ReadInt32 (8);
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if (!IsSaneCount (count))
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return null;
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List<Entry> dir;
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if (version > 5)
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dir = ReadIndexV6 (file, count);
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else
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dir = ReadIndexV5 (file, count);
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if (null == dir)
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return null;
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return new BoxArchive (file, this, dir, VersionKeyMap[version]);
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}
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List<Entry> ReadIndexV6 (ArcView file, int count)
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{
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int index_offset = 0x10;
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var dir = new List<Entry> (count);
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for (int i = 0; i < count; ++i)
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{
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var entry = new Entry {
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Name = file.View.ReadString (index_offset, 0x10),
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Type = "script",
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Offset = file.View.ReadUInt32 (index_offset+0x10),
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Size = file.View.ReadUInt32 (index_offset+0x14),
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};
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if (!entry.CheckPlacement (file.MaxOffset))
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return null;
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dir.Add (entry);
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index_offset += 0x18;
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}
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return dir;
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}
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List<Entry> ReadIndexV5 (ArcView file, int count)
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{
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var base_name = Path.GetFileNameWithoutExtension (file.Name);
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int index_offset = 0xC;
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uint next_offset = file.View.ReadUInt32 (index_offset);
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var dir = new List<Entry> (count);
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for (int i = 0; i < count; ++i)
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{
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index_offset += 4;
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var entry = new Entry {
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Name = string.Format ("{0}#{1:D2}.evt", base_name, i),
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Type = "script",
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Offset = next_offset,
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};
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next_offset = i+1 == count ? (uint)file.MaxOffset : file.View.ReadUInt32 (index_offset);
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entry.Size = next_offset - (uint)entry.Offset;
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if (!entry.CheckPlacement (file.MaxOffset))
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return null;
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dir.Add (entry);
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}
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return dir;
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}
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public override Stream OpenEntry (ArcFile arc, Entry entry)
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{
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var input = arc.File.CreateStream (entry.Offset, entry.Size);
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var barc = arc as BoxArchive;
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if (null == barc)
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return input;
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return new CryptoStream (input, new XorTransform (barc.Key), CryptoStreamMode.Read);
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}
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}
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[Export(typeof(ArchiveFormat))]
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public class AoiMyOpener : ArchiveFormat
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{
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public override string Tag { get { return "AOIMY"; } }
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public override string Description { get { return "Aoi engine script archive"; } }
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public override uint Signature { get { return 0x4D494F41; } } // 'AOIM'
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public override bool IsHierarchic { get { return false; } }
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public override bool CanCreate { get { return false; } }
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public override ArcFile TryOpen (ArcView file)
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{
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if (!file.View.AsciiEqual (4, "Y01\0"))
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return null;
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int count = Binary.BigEndian (file.View.ReadInt32 (8));
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if (!IsSaneCount (count))
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return null;
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int index_offset = 0x10;
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var dir = new List<Entry> (count);
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for (int i = 0; i < count; ++i)
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{
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var entry = new Entry {
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Name = file.View.ReadString (index_offset, 0x10),
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Type = "script",
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Offset = Binary.BigEndian (file.View.ReadUInt32 (index_offset+0x10)),
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Size = Binary.BigEndian (file.View.ReadUInt32 (index_offset+0x14)),
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};
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if (!entry.CheckPlacement (file.MaxOffset))
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return null;
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dir.Add (entry);
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index_offset += 0x18;
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}
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return new ArcFile (file, this, dir);
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}
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public override Stream OpenEntry (ArcFile arc, Entry entry)
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{
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var data = arc.File.View.ReadBytes (entry.Offset, entry.Size);
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uint offset = (uint)entry.Offset;
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for (int i = 0; i < data.Length; ++i)
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{
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data[i] ^= KeyFromOffset (offset++);
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}
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return new MemoryStream (data);
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}
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static byte KeyFromOffset (uint offset)
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{
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uint v1 = offset - 0x5CC8E9D7u + (0xA3371629u >> (int)((offset & 0xF) + 1)) - (0x5CC8E9D7u << (int)(31 - (offset & 0xF)));
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uint v3 = v1 << (int)(31 - ((offset >> 4) & 0xF));
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uint v4 = v1 >> (int)(((offset >> 4) & 0xF) + 1);
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uint v5 = offset - 0x5CC8E9D7
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+ ((offset - 0x5CC8E9D7u + v3 + v4) << (int)(31 - ((offset >> 8) & 0xF)))
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+ ((offset - 0x5CC8E9D7u + v3 + v4) >> (int)(((offset >> 8) & 0xF) + 1));
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uint v6 = offset - 0x5CC8E9D7u
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+ (v5 << (int)(31 - ((offset >> 12) & 0xF))) + (v5 >> (int)(((offset >> 12) & 0xF) + 1));
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uint v7 = offset - 0x5CC8E9D7u
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+ (v6 << (int)(31 - ((offset >> 16) & 0xF))) + (v6 >> (int)(((offset >> 16) & 0xF) + 1));
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int v8 = (int)(offset >> 20) & 0xF;
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uint v9 = offset - 0x5CC8E9D7u
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+ ((offset - 0x5CC8E9D7u + (v7 << (31 - v8)) + (v7 >> (v8 + 1))) << (int)(31 - ((offset >> 24) & 0xF)))
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+ ((offset - 0x5CC8E9D7u + (v7 << (31 - v8)) + (v7 >> (v8 + 1))) >> (int)(((offset >> 24) & 0xF) + 1));
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uint key = (offset - 0x5CC8E9D7 + (v9 << (int)(31 - (offset >> 28))) + (v9 >> (int)((offset >> 28) + 1))) >> (int)(offset & 0xF);
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return (byte)key;
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}
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}
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}
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